Paper making and fiber liberation – Apparatus – Digester
Patent
1998-01-15
2000-07-11
Nguyen, Dean T.
Paper making and fiber liberation
Apparatus
Digester
162246, D21C 706, D21C 708
Patent
active
060867175
ABSTRACT:
A new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy and at the same time achieve very good pulp properties. The digesting process includes a top separator that separates the transport liquid from the fiber material and permits the fiber material to be exposed to the cooking liquid.
REFERENCES:
patent: 3902962 (1975-09-01), Reinhall
patent: 5089086 (1992-02-01), Silander
patent: 5882477 (1999-03-01), Laakso et al.
Olsson Sven-Erik
Snekkenes Vidar
Fasth Rolf
Kvaerner Pulping AB
Nguyen Dean T.
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